Friction-gear.



Patented May 27, I902.

E. P. DAWSON.

FRICTION GEAR. (Application filed Jan. 17, 1902 (No Model.)

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Nrrnn STATES PATENT... OFFICE.

EDWARD PILE DlUVSON, OF BUTTE, MONTANA, ASSIGNOR OF ONE-THIRD TO HOWVARD W. PIERCE, .OF BUTTE, MONTANA.

FRICTION-GEAR.

SPECIFICATION forming part of Letters Patent No. 701,162, dated May 27, 1902.

Application filed January 17, 1902. Serial No. 90,106. (No model-l To all whom it may concern:

Be it known that I, EDWARD PILE DAWSON, a citizen of the United States, and a resident of Butte, in the county of Silverbowand State of Montana, have invented a new and Improved Friction-Gear, of which the following is a full, clear, and exact description.

This invention relates to a peculiarly-constructed variable-speed friction-gear. It is I0 here shown in connection with a sewing-machine, but is useful in many other ways, as will be apparent.

This specification is a specific description of one form of the invention, while the claims are definitions of the actual scope thereof.

Reference is to be had to the accompanying drawings,forming apart of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is aside view of the invention. Fig. 2 is aviewfrom between the cones. Fig. 3 is a section of one of the cones, and Fig. 4: is a section of the shifting wheel.

In the drawings, a represents an electric motor or other source of power, and 0. its

shaft. 7

1) represents a friction-cone fastened on the shaft a and driven thereby.

c representsthe shaft to be driven, which carries fast the cone cl. This cone d is arranged at one side of. the cone 1), with their tapering faces parallel and ranging diagonally of the shafts a and c.

6 represents a two-part frame, the main portion of which is straight and projected between the'adjacent faces of the cones d and h in parallelism therewith. The ends of this frame are connected by extensions c with the motor a or any other suitable sup- 0 port whereby to sustain the frame.

On the frame e runs a slide which is composed of the cross-pieces f, connected together by tubes f, these tubes slidably re ceiving the respective parts of the frame 6.

In the slide, between the cross-pieces thereof, is mounted a shiftable transmitting-wheel g. This wheel is disposed with its axis at right angles to the shafts a and c, the wheel lying,

therefore, in a horizontal plane and beingof such diameter that in moving between the cones it will engage both,- thereby transmitting movement from one to the other. It will be apparent that by changing the position of the transmitting-wheel the speed of the movement transmitted to the shaft 0 may be varied. The slide is operated in one direction by a spring h, attached to the slide and to a bar 71, fastened to the frame 6, and

in the other direction by a cord drunning through guides t'.

Various changes in the form and details of my invention maybe resorted to at willwithout departing from the spirit of my invention. Hence I consider myself entitled to all forms of the invention as may lie within the intent of my claims.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent- 1. The combination of two rotary frictional 7o members arranged with their axes out of alinement, a transmitting-wheel hearing between said members, a slide on'which the wheel is mounted, a frame carrying the slide, and means for moving the slide, said means comprising a spring actuating the slide in one direction and a cord to draw the slide against the action of the spring.

2. The combination of two rotary cones having their axes out of alinement and hav- 8o ing their opposite faces extending parallel to each other, a transmitting-wheel having its axis extending across the axes of the cones and movable between the said'parallel faces of the cones, a slide carrying the transmitting-wheel, and a frame in which the slide is movable, the frame extending between said opposed faces of the cone and essentially parallel therewith.

3. The combination of two rotary cones 6 having their axes out of alinement and having their opposite faces extending parallel to each other, atransmitting-wheel having its axis extending across the axes of the cones and movable between the said parallel faces 9 5 of the cones, means for mounting the transmitting-wheel, the said means for mounting the transmitting-wheel comprising a slide carrying the wheel and afframe in which the slide is movable, a spring drawing the slide in one we direction, and a flexible connection attached to the slide for moving it against the action parallel to each other, a frame extending in parallelism with said opposite faces, a slide mounted on the frame, a transmitting-wheel carried by the slide and engaging the said opposite faces of the frictional members, a spring drawing the slide in one direction, and a flexible connection attached to the slide to permit moving it against the action of the spring.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' I EDWARD PILE DAWSON. Witnesses:

FRED H. ALLEN, WM. H. PIERCE. 

